Self-adjusting dumb-waiter grip and friction-roller.



" N F. 'ACKERMAN. SELF ADJUSTING DUMB (Application filed Jan. 8, 1902.! (No Model.)

Patented July 22, I902.

WAITER GRIP AND FRICTION ROLLER.

I I 7/ 73 g L L36 1f 2 (f a I /7 A TTOR/VEY.

UNITED STATES PATENT OFFICE.

FRANK AOKERMAN, OF NEW YORK, N. Y.

SELF-ADJUSTING DUMB-WA ITER GRIP AND FRICTION-ROLLER.

SPECIFICATION forming part of Letters Patent No. 705,010, dated July 22, 1902. Application filed January 3, 1902. Serial No. 88,284. (No model.)

To all whom it may concern:

Be it known that I, FRANK AOKERMAN,a citizen of the United States, residing in the city, county, and State of New York, have invented a new and useful Improvement in Self-Adjusting Dumb-Waiter Grips and Friction- Rollers, of which the following is a specification.

My invention relates especially to the construction and arrangement of guiding devices employed upon dumb-waiters, and has for its object the provision of a self-adj ustin g guide, grip, and friction-rolleuwhereby the dumbwaiter car will be efiectually guided.

To attain the desiredend, my invention consists, essentially, in certain novel and use ful combinations or arrangements of parts and peculiarities of construction and operation, all of which willbe hereinafter first fully described and then pointed out in the claims.

In the accompanying drawings, forming a part hereof, Figure 1 is a plan view of a dumbwaiter car, showing my invention applied thereto in two different positions. Fig.2 is a plan View of a guiding bolt or bar removed from its casing. Fig. 3 is a side elevation of the guiding to'ngue 'adjustably mounted at the free extremityofthe bar.

Like numerals of reference wherever they occur indicate corresponding parts in all the figures.

1 is the car of a dumb-waiter. 2 is the wall of the shaft, and 3 represents guideways se cured at the rear of the shaft, the said guideways being rabbeted at 4 and 5.

26 is the usual counterweight playing in the rabbets 5.

6 illustrates a side guide piece or way which may be employed in lieu of the said piece 6 having a rabbet 4.

7 is a metalcasing or box arranged for securing in any appropriate position upon the car 1 by means of screws 8.

9 is a bolt or bar slotted at 10 for the reception of a controlling-spring 11. I V 12 isa spring secured to the side of the bar 9. The outer extremity of the bar 9 is cut away, as shown in Fig. 3 of the drawings, for the reception of an adjustable tongue 13, said tongue being held in place by means of a screw or pin 14.

pieces .3, the

19 is a screw which passes through the cas= ing '7 and the slot in the bar 9. i

15 is a plate provided with slots 16 and with cars 17, wherein is mounted a frictionroller 18.

When constructed and arranged in accordance with the foregoing description and the device placed in position upon a car, the operation of my invention is as follows: Referring to the upper portion of Fig. 1 of the drawings, it will be observed that the tongue 13 is adjusted to a position to take the rabbet 4 and the roller-plate placed so as to 10 cate the friction-roller in proper relation to the face of the guide-strip. In order to apply the device to the opposite guide 3, the bar 9 is removed from the casing 7 and turned over, bringing the tongue in position for en gaging the rabbet 4 and the roller-plate car'- ried to the other side of the casing. When the parts are in this position, the bar 9 is: free to movea'considerable distance both longitudinally and laterally, thus accurately accommodating the guide and grip to any in-= equalities or variations from a strict perpendicular that may exist in the guide-strips, While at the same time the tongues 13 are held in place within their respective rabbets.

When the guide-strips are placed at the sidesof the car, as 6, the tongue 13 is adjusted as shown at the bottom of Fig. 1 of the drawings and the roller-plate centrally located. I thus provide a combination se1fadjusting dumb waiter grip and frictionroller which may be readily applied to any car and will act with the guide-strips located in any position, permitting the car to move with the greatest ease and freedom.

Having now fully described my invention, what I claim as new therein, and desire to secure by Letters Patent,-is-' 1. Adumb-waiter grip in which is comprised a casing arranged for securing to a car, in combination with a spring-controlled bar or bolt provided at its outer extremity with a guide-tongue adapted and arranged to engage with a guide strip, substantially as shown and described;

2. A dumb-waiter grip in which is comprised a casing arranged for securing to a car, in combination with a spring-actuated bar ICO or bolt provided at its outer extremity with an adjustable guide-tongue adapted and arranged to engage with a guide-strip, substantiaily as shown and described.

5 3. A dumb-Waiter guide and grip in which is comprised a casing arranged for securing to a car, in combination with a spring-actuated bar or bolt provided at its outer extremity with an adjustable guide-tongue 10 adapted and arranged to engage with a guide- FRANK AOKERMAN.

Witnesses:

LoUIs F. BRAUN, A. M. PIERCE. 

